Oil-cake envelop or press-cloth.



N. W. L. BROWN.

OIL CAKE ENVELOP 0R PRESS CLOTH.

Patented Feb. 8, 1910.

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NIMROD W. L. BROWN, OF THOMASVILLE, ALABAMA.

OIL-CAKE ENVELOP OR PRESS-CLOTH.

Specification of Letters Patent.

Patented Feb. 8, 1910.

Application filed August 5, 1908. Serial No. 447,170.

To all whom it may concern:

Be it known that I, Nminoo L. BROWN, a citizen of the United States, andresident of Thomasville, in the county of Clarke and State of Alabama,have invented new and useful Improvements in Oil-Cake Envelops orPress-Cloths, of which the following is a specification.

In cotton seed industry the cotton seed meats are subjected to heavypressure to express the oil, and it is customary to envelop the mass ofseeds which is put into the press in what is known as a press cloth.

pressure in the oil press that a textile of great strength is necessaryto stand the service.

Various cloths have been adopted from time to time, but the cloth mostin favor is made of camels hair which gives when woven a strong clothand one which drains readily. The camels hair cloth however is soexpensive that it forms a very considerable item in the operation of oilmilling plants, and it is with the object of supplying a press cloth ormat envelop which has the required strength and draining qualities andwhich can be supplied at much less cost than the cloths now commonlyused, that I have devised the present novel cloth.

It is essential that a press cloth for oil presses be strong, as abovestated; that it permit the expressed oil from the mass of seeds toescape freely from the envelop; and that a good drainage of the oil thusexpressed be given. I have found that by taking a hide, preferablycowhide with the hair thereon, cutting it into proper dimensions forpress cloths. and perforating it with a large number of minuteperforations, a very strong and good draining press cloth is provided.And in the drawings which acconr pany this specification and form a partthereof, I have illustrated a press cloth made in accordance with myinvention in order that the invention may be clear to those skilled inthe art.

In these drawings: Figure 1 is a view of a press cloth made inaccordance with my invention, this view being on the flesh side of thehide. Fig. 2 is a similar view of the reverse or hair side of the cloth.Fig. 3 is a view of a press cloth folded around a cake of meats for thepress. Fig. 4 is a view showing the press cloth folded so as to bringthe folded end on the underside of the cake. Fig. 5 is a perspectiveView of a press-box. Fig. (5 is a detail sectional view of a portion ofa press cloth and the press-box, to which reference will be madehereinafter.

Referring to the drawings by numerals like numbers indicating like partsin the several views, 1 denotes a press cloth made of a piece of hide,the hide, as shown, having the hair 2 left on. The cloth 1 is perforatedwith a large number of minute perforations 3, which penetrate or passthrough Such press cloths are sub ected to such heavy the hide, asclearly shown in Fig. 1, but which on the hairy side will be covered ormatted over by the hair 2, as will be seen from Figs. 2, 3 and l. It isessential, of course, that the press cloth give a free flow of oiltherethrough and as the hide is naturally too impervious to permit theexpressed oil to escape freely I resort to the perf0rating of the hideto secure the porosity of the cloth.

The press cloth with its inclosed cake is placed in the press-box 4, andit will be observed from Fig. 6 that since it is impos sible to providea press-box having a draining plate with the same number of perforationsas are necessary in the press cloth, and as it is also impossible toexpect the minute perforations 3 in the press cloth 1 to register withthe perforations 6 in the bottom of the press-box 4, the number ofactive perfora tions 3 in the press cloth would ordinarily be limited tothose which register with the perforations 6 in the bottom of thepressbox l, for under the extremely heavy pres-- sure to which the presscloth and cake are subjected, the perforations 3 which do not registerwith the perforations 6 would be entirely closed. This difiiculty,however, is overcome in the present instance by reason of the fact thatthe hair 2 which lies interposed between the press cloth 1 and the faceof the press-box 4 forms a drainage area between the envelop and thepress-box which will permit and stimulate draining of the oil from themat through all of the perforations 3, and no danger of shutting off anyof these perforations exists no matter to what pressure the cake ofmeats may be subjected.

The press-boxes 4 are preferably provided with side walls 5 on all foursides, as

shown, although, of course, any type of press box may be used, and I donot limit my invention to any particular form of told ing the presscloth, although the method of folding shown in Fig. t is preferable, asI find it can be more readily removed after pressure.

It will be seen therefore that by utilizing; hide in the mannerdescribed I am able to produce a press cloth which may be very cheaplymade and which has all the advantages of the expensive press cloths ofcamels hair, and like fabrics with the superiority of strength, for Ihave found in practice that the hide becomes filled with the oil, issoft and pliable and easily handled and its durability materiallyincreased.

I do not, of course, limit myself to the particular method shown ofmaking the hide porous, as it is possible to secure this in other waysthan by filling it with minute perforations shown, as, for example, byslitting, or in fact providing any form of apertures which will permitthe flow of oil without allowing the escape of the meats. R

Having fully described my invention I claim:

1. As a new article of maimfacture a press cloth for oil presses formedof hairy hide with apertures therethrough.

2. As a new article of manufacture, a press cloth for oil presses formedof a sub stantially impervious sheet of flexible mate rial, said sheethaving apertures therethrough, and a fibrous drainage (oat integral withsaid sheet overlying such apertures.

3. As a new article of maimtacture, a press cloth for oil presses termed0] hide having a plurality of minute perforations therethrough with thenaturally matted hair of the hide overlying such perforations.

In testimony whereof I have hereunto set my hand in presence of twosubseribin; witnesses.

NIB'IROI) I1. BROIYN.

itnesses:

R. G. Hannxnss, J. H. Roam,

